Longitudes of Dunkirk and Paris. 245 
Caille. See Mem. de 1 ' Acad. 1758. The computed arc, 
however, between Greenwich and Paris is 19 fatnoms longer 
than the meafured arc, which anfwers to a little more than 
of latitude. 
The longitude of Paris on this ellipfoid is 9 m. 20 X V s. 
If it be contended, that the operations at the equator and polar 
circle were as correft as thofe executed for the like purpofe 
in middle latitudes ; and that a kind of mean between the ex- 
treme refults ought to be preferred ; we fliall ftill get an ellip- 
foid, whofe axes are nearly as 229 to 230, by taking the 
degrees at the equator and polar circle each fathoms lefs, 
and that in latitude 50° c>'§ as much greater than the meafured 
ones; and the longitude of Paris will be found 9m. 19/^8; 
But the computed meridional arc between Greenwich and Paris 
will exceed the meafured one by a quantity anfwering to about 
1 1" of latitude. 
It is almoft needlefs to obferve, that the longitude of Paris 
(9 m. 20 s.) deduced by Dr. Maskelyne from the different 
refults found by aftronomical obfervations (Phil. Tranf. 1787) 
agrees to lefs than half a fecond with either of the above 
determinations. 
N. B. In the Table of General Refults, p. 232. Vol. LXXX. read 18' 46"' tor 
the longitude of Wrotham Hill; this ihould have been correfted in the Appendix. 
